TM 5-5420-227-24
INTRODUCTION - Continued
Service, clean, or change oil filters, as applicable, when they are known to be contaminated
clogged; service is recommended by AOAP laboratory analysis; or at prescribed hardtime
intervals.
Look at hoses, fluid lines, and tubes for bends, wear, cracks, or leaks. Replace bad parts. Make
sure all clamps and fittings are tight. If a fitting leaks, tighten it.
(5) Lubrication.
Use only authorized lubricants.
All lubrication instructions are mandatory.
When checking fluid levels, vehicle must be on level surface.
Oil filters shall be serviced/cleaned/changed when they are known to be contaminated or
clogged, service is recommended by AOAP, or hard time service is required.
Dispose of used lubricant in accordance with local Standing Operating Procedures (SOP).
For arctic operation, see FM 9-207.
For desert operation, see FM 90-3.
Clean all grease fittings before attaching grease gun.
When using grease gun, operate until grease appears around seals or out of relief valve and
check escaping grease for contamination. If contamination is found, notify support maintenance.
If no other treatment is directed, paint or clean and coat unprotected metal surfaces with
cleaner, lubricant, preservative (CLP).
Clean around filler necks/drain plugs/openings before servicing to keep dirt from entering
system.
(6) Leakage Definitions.
Fluid leaks affect vehicle status. Learn the following classes of fluid leaks for unit PMCS.
Class I
Seepage of fluid (as indicated by wetness or discoloration) not great enough
to form drops.
Class II
Leakage of fluid great enough to form drops but not enough to cause
drops to drip from item being checked.
Class III Leakage of fluid great enough to form drops that fall from the item being
checked.
All Class III leaks and any class fuel leak in the engine compartment or in the personnel
heater system must be repaired before operating the vehicle. Vehicle may be operated with
Class I or Class II leaks.
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